Waterproof component for breathable film of low-voltage battery box

Abstract

The utility model relates to the technical field of new energy automobile battery protection, in particular to a low-voltage battery box breathable film waterproof assembly which comprises a battery box body, a mounting seat is arranged on one side of the battery box body, an annular cover is arranged on one side of the mounting seat, and a breathable film body is arranged on one side of the annular cover. An ultrasonic ring is arranged on one side of the breathable film body, a first hot melting rib and a second hot melting rib are fixedly connected to the inner wall of the ultrasonic ring, and a first sealing groove and a second sealing groove are formed in the face, close to the breathable film body, of the ring cover. The ultrasonic ring, the upper cover and other components are arranged, and the ultrasonic ring and the upper cover are matched with each other, so that the ultrasonic ring and the upper cover can form stepped sealing on the breathable film body through the first hot melting rib and the second hot melting rib, and the thermal stress is dispersed; the ultrasonic ring and the upper cover are arranged, so that the welding strength and the sealing performance of the breathable film body are improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery protection technology, specifically a low-voltage battery box breathable membrane waterproof component. Background Technology

[0002] The specifics vary slightly depending on the type of electric vehicle. In pure electric vehicles equipped solely with a battery, the battery is the sole power source for the vehicle's drive system. In hybrid electric vehicles, which combine a conventional engine (or fuel cell) with a battery, the battery can function as either the primary or auxiliary power source for the drive system. Therefore, at low speeds and during startup, the battery acts as the primary power source; during full-load acceleration, it functions as an auxiliary power source; and during normal driving, deceleration, or braking, it functions as an energy storage device.

[0003] Currently, low-voltage battery box covers commonly use breathable membrane components to achieve waterproof and breathable functions. The traditional structure involves fixing the breathable membrane to the ultrasonic ring via hot-melt welding, and then installing the ultrasonic ring to the cover via ultrasonic welding. However, existing technologies have the following drawbacks: the welding strength of a single hot-melt rib is insufficient, and under complex working conditions, vibration or thermal expansion and contraction can easily cause the weld interface to crack, compromising the seal; the burst pressure of the breathable membrane fluctuates greatly, often falling below the design requirement of 100 kPa, affecting the safety of the internal pressure balance of the battery box; and the matching degree of process parameters between the hot-melt welding and ultrasonic welding stages is low, easily leading to stress concentration.

[0004] This invention achieves the dispersion of thermal stress on the breathable membrane by setting two parallel hot-melt ribs on the inner ring surface of the ultrasonic ring to form a stepped sealing layer; and adds an annular groove to the outer wall of the ultrasonic ring to form a mechanical interlocking structure with the welding surface of the upper cover; thereby enhancing the welding effect of the breathable membrane and improving the sealing performance. Utility Model Content

[0005] In view of the above-mentioned background technology, there are shortcomings and defects in the existing technology, such as low welding strength and sealing performance.

[0006] This utility model discloses a low-voltage battery box breathable membrane waterproof component, including a battery box body, a mounting base on one side of the battery box body, a ring cover on one side of the mounting base, a breathable membrane body on one side of the ring cover, an ultrasonic ring on one side of the breathable membrane body, a mating groove on the side of the ring cover near the breathable membrane body, a first hot-melt rib and a second hot-melt rib fixedly connected to the inner wall of the ultrasonic ring, and a first sealing groove and a second sealing groove on the side of the ring cover near the breathable membrane body.

[0007] Furthermore, a sleeve is provided on the side of the ring cover away from the breathable membrane body, and a sealing ring is fixedly connected to the outer surface of the sleeve.

[0008] Furthermore, the outer surface of the sealing ring is provided with equidistantly arranged limiting holes, and a limiting rod is slidably connected inside each limiting hole.

[0009] Furthermore, springs are arranged at equal intervals on both sides of the sealing ring, and each spring is sleeved on the outer surface of the corresponding limiting rod.

[0010] Furthermore, the outer surface of the mounting base is provided with four guide grooves, and a guide rod is provided inside each guide groove.

[0011] Furthermore, two protective boxes are fixedly connected to the outer surface of the mounting base, and each protective box is provided with two connecting rods inside.

[0012] Furthermore, each of the protective boxes has two sliders slidably connected inside, and each of the protective boxes has a damping rod inside.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model, by setting up components such as an ultrasonic ring and a top cover, and through the cooperation between the ultrasonic ring and the top cover, enables the ultrasonic ring and the top cover to form a stepped seal on the breathable membrane body through the first hot melt rib and the second hot melt rib, and to disperse the thermal stress. Thus, this utility model achieves the effect of improving the welding strength and sealing performance of the breathable membrane body by setting up an ultrasonic ring and a top cover.

[0015] 2. This utility model, by setting up components such as connecting rods and sliders, and through the cooperation between the connecting rods and sliders, enables the sleeve and sealing ring to drive the slider to slide through the guide rod and connecting rod, thereby driving the extension and retraction of the damping rod, thus achieving the effect of improving the compressive strength of the breathable membrane body by setting up connecting rods and sliders. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the sleeve structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the longitudinal section of the ring cap and ultrasonic ring of this utility model;

[0020] Figure 4 This is a schematic diagram of the connecting rod structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the internal structure of the mounting base of this utility model.

[0022] In the diagram: 1. Battery box body; 2. Mounting base; 3. Ring cover; 4. Breathable membrane body; 5. Ultrasonic ring; 6. Docking groove; 7. First hot melt rib; 8. Second hot melt rib; 9. First sealing groove; 10. Second sealing groove; 11. Sleeve; 12. Sealing ring; 13. Limiting hole; 14. Limiting rod; 15. Spring; 16. Guide groove; 17. Guide rod; 18. Protective box; 19. Connecting rod; 20. Slider; 21. Damping rod. Detailed Implementation

[0023] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0024] Please see Figure 1 , 2 3, 4, 5, This utility model discloses a low-voltage battery box breathable membrane waterproof component, comprising a battery box body 1, a mounting base 2 on one side of the battery box body 1, a ring cover 3 on one side of the mounting base 2, a breathable membrane body 4 on one side of the ring cover 3, an ultrasonic ring 5 on one side of the breathable membrane body 4, a mating groove 6 on the side of the ring cover 3 near the breathable membrane body 4, a first hot-melt rib 7 and a second hot-melt rib 8 fixedly connected to the inner wall of the ultrasonic ring 5, a first sealing groove 9 and a second sealing groove 10 on the side of the ring cover 3 near the breathable membrane body 4, the first sealing groove 9 corresponding to the first hot-melt rib 7, and the second sealing groove 10... Corresponding to the second hot melt rib 8, the height of the first hot melt rib 7 and the second hot melt rib 8 are 0.3-0.35mm, and the spacing is 0.5mm, forming a stepped sealing layer. The breathable membrane body 4 is welded to the ultrasonic ring 5. The first hot melt rib 7 is used for pre-fixation of the breathable membrane body 4, and the second hot melt rib 8 applies the main welding pressure, thereby dispersing the thermal stress. An annular groove with a depth of 0.3mm is opened on the outer surface of the ultrasonic ring 5, and the ultrasonic ring 5 is welded to the ring cover 3, so that the ultrasonic ring 5 forms a mechanical interlocking structure with the welding surface of the ring cover 3 through the butt groove 6, thereby improving the welding strength and sealing performance of the breathable membrane body 4.

[0025] A sleeve 11 is provided on the side of the ring cover 3 away from the breathable membrane body 4. A sealing ring 12 is fixedly connected to the outer surface of the sleeve 11. One end of the sleeve 11 is fixedly connected to the ring cover 3, and the other end of the sleeve 11 is connected to the inside of the battery box body 1. The sealing ring 12 is slidably connected to the inner wall of the mounting base 2.

[0026] The outer surface of the sealing ring 12 is provided with equidistantly arranged limiting holes 13. Each limiting hole 13 is slidably connected to a limiting rod 14. Both ends of the limiting rod 14 are fixedly connected to the inner wall of the mounting base 2. The limiting rod 14 plays a limiting role in the sliding of the sealing ring 12.

[0027] Springs 15 are arranged at equal intervals on both sides of the sealing ring 12. Each spring 15 is sleeved on the outer surface of the corresponding limiting rod 14. One end of each spring 15 is in contact with the outer surface of the sealing ring 12, and the other end of each spring 15 is in contact with the inner wall of the mounting base 2. The springs 15 limit the components such as the sleeve 11 through the sealing ring 12. When the sealing ring 12 slides inside the mounting base 2, the corresponding spring 15 is compressed.

[0028] The outer surface of the mounting base 2 is provided with four guide grooves 16. Each guide groove 16 is provided with a guide rod 17. One end of each guide rod 17 is fixedly connected to the outer surface of the sealing ring 12. When the sealing ring 12 slides inside the mounting base 2, the sealing ring 12 drives the guide rod 17 to move inside the guide groove 16.

[0029] Two protective boxes 18 are fixedly connected to the outer surface of the mounting base 2. Each protective box 18 has two connecting rods 19 inside. The protective boxes 18 are installed symmetrically, and one end of each connecting rod 19 is rotatably connected to the other end of the corresponding guide rod 17.

[0030] Each protective box 18 has two sliders 20 slidably connected inside, and each protective box 18 has a damping rod 21 inside. Each slider 20 is rotatably connected to the other end of the corresponding connecting rod 19, and the other end of each damping rod 21 is fixedly connected to the outer surface of the corresponding slider 20. When the guide rod 17 moves inside the guide groove 16, the guide rod 17 drives the slider 20 to slide through the connecting rod 19, thereby driving the damping rod 21 to extend and retract.

[0031] The implementation principle is as follows: the breathable membrane body 4 and the ultrasonic ring 5 are welded together by the first hot melt rib 7 and the second hot melt rib 8. The ultrasonic ring 5 and the ring cover 3 are welded together by the butt groove 6, so that the first hot melt rib 7 corresponds to the first sealing groove 9 and the second hot melt rib 8 corresponds to the second sealing groove 10, thereby realizing the installation and fixation of the breathable membrane body 4. When the internal and external air pressure of the battery box body 1 changes, the breathable membrane body 4 is subjected to air pressure, so that the atmospheric pressure drives the sleeve 11 to move through the breathable membrane body 4 and the ring cover 3 and other components. The sleeve 11 drives the sealing ring 12 to slide inside the mounting base 2. The corresponding spring 15 is compressed. The sealing ring 12 drives the guide rod 17 to move. The guide rod 17 drives the slider 20 to slide through the connecting rod 19. The slider 20 drives the damping rod 21 to extend and retract, thereby buffering the force on the breathable membrane body 4.

[0032] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A low-voltage battery box breathable membrane waterproof assembly, comprising a battery box body (1), characterized in that: A mounting base (2) is provided on one side of the battery box body (1), a ring cover (3) is provided on one side of the mounting base (2), a breathable membrane body (4) is provided on one side of the ring cover (3), an ultrasonic ring (5) is provided on one side of the breathable membrane body (4), a docking groove (6) is provided on the side of the ring cover (3) near the breathable membrane body (4), a first hot melt rib (7) and a second hot melt rib (8) are fixedly connected to the inner wall of the ultrasonic ring (5), and a first sealing groove (9) and a second sealing groove (10) are provided on the side of the ring cover (3) near the breathable membrane body (4).

2. The low-voltage battery box breathable membrane waterproof assembly according to claim 1, characterized in that: A sleeve (11) is provided on the side of the ring cover (3) away from the breathable membrane body (4), and a sealing ring (12) is fixedly connected to the outer surface of the sleeve (11).

3. The low-voltage battery box breathable membrane waterproof assembly according to claim 2, characterized in that: The outer surface of the sealing ring (12) is provided with equidistantly arranged limiting holes (13), and a limiting rod (14) is slidably connected inside each limiting hole (13).

4. The low-voltage battery box breathable membrane waterproof assembly according to claim 2, characterized in that: Both sides of the sealing ring (12) are provided with springs (15) arranged at equal intervals, and each spring (15) is sleeved on the outer surface of the corresponding limiting rod (14).

5. A low-voltage battery box breathable membrane waterproof assembly according to claim 1, characterized in that: The outer surface of the mounting base (2) is provided with four guide grooves (16), and a guide rod (17) is provided inside each guide groove (16).

6. The low-voltage battery box breathable membrane waterproof assembly according to claim 1, characterized in that: Two protective boxes (18) are fixedly connected to the outer surface of the mounting base (2), and two connecting rods (19) are provided inside each protective box (18).

7. A low-voltage battery box breathable membrane waterproof assembly according to claim 6, characterized in that: Each of the protective boxes (18) has two sliders (20) slidably connected inside, and each of the protective boxes (18) has a damping rod (21) inside.

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